Milwaukee CD611 Digital Conductivity Pen (EC) - digital pen for measuring electrical conductivity (EC)

CD611 is a digital pen for measuring electrical conductivity (EC) of liquids from Milwaukee's economical range of measuring instruments. Suitable for hobby gardeners who want to ensure their plants receive the right amount of nutrients.

• Measures conductivity and temperature with automatic temperature compensation
• Ideal range for hydroponics (0 to 20 000 µS/cm)
• The measurement units in µS/cm can easily be converted to ppm
• Factory calibrated with the option to recalibrate when needed

Instructions for use here*. Calibration instruction video here*.

The set includes:

• 1x Milwaukee CD611 Digital Conductivity Pen (EC) - digital pen for measuring electrical conductivity (EC)
• 1x calibration screwdriver

Features:

• measurement range: 0 to 20 000 µS/cm
• resolution: 100 µS/cm
• measurement accuracy: ±2% full scale
• temperature compensation: automatic, from 5 to 50°C, with ß=2%/°C
• calibration: manual, single-point
• operating environment: temperature 0 to 50°C, humidity 95%
• batteries: 4x LR44 1.5V alkaline (included)
• battery life: up to 350 h of operation
• dimensions: 32 x 180 x 65 mm
• weight: 60 g

Maintenance: EC electrodes can develop nutrient build-up over time. To minimise build-up, always rinse the probe in fresh tap water after each use!.

EC to TDS conversion: Milwaukee EC Pen, like all conductivity meters, measures electrically charged ions in a solution and provides an absolute measure of conductivity. EC is often converted to TDS in parts per million (ppm). Different scales include the 500 scale, 650 scale and 700 scale. However, true PPM can only be determined through chemical analysis. Your mS/cm reading can be approximately converted to TDS (ppm), as shown in the examples below.

1. 2.00 mS/cm = 2000 µS/cm = 1000 ppm on the .50 factor scale
2. 2.00 mS/cm = 2000 µS/cm = 1400 ppm on the 442 scale or .70 factor scale